Saw-holder.



B. E. SMITH.

SAW HOLDER.

APPLICATION FILED MAY 15', 1913.

1 ,O94,939', Patented Apr. 28, 1914.

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\lOLUMBIA PLANOGRAPM co.. WMMINGTON. D. c.

BENJAMIN SMITH, OF LATROBE, PENNSYLVANIA.

SAW-HOLDER.

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Specification of Letters Patent.

Patented Apr. 28, 1914.

Application filed May 15, 1913. Serial No. 767,797.

To (127 who/1t it may concern:

Be it known that I, BENJAMIN E. SMITH, a citizen of the United States,residing at Latrobe, in the county of IVestmoreland and State ofPennsylvania, have invented certain. new and useful Improvements inSaw-Holders, of which the following is a specification.

My invention relates to saw holders of that class which consist of aU-shaped frame having means for securing a comparatively narrow sawblade thereto and for placing the same under tension.

The objects of the invent-ion are to provide improved holding andlocking means for the saw which shall be simple in construction andoperation, and by means of which the tension can be varied as desired.

\Vith the above general objects in view, the invention consists in theconstruction and arrangement of parts hereinafter described and claimed,and illustrated in the accompanying drawings, in which,

Figure 1 is a side elevation of a complete saw holder showing myinvention as applied thereto; Fig. 2 is a fragmentary detail in sideelevation, on an enlarged scale, of one end of the saw frame; Fig. 3 isan end elevation or edge view of the same; Fig. 4 is a similar viewshowing the other end of the saw frame, the parts being. illustrated inunlocked position; Fig. 5 is a view of the parts shown in Fig. 4, butshowing the device in locked position; Fig. 6 is a bottom plan view ofFig. 5; and, Fig. 7 is a perspective view of my improved holding deviceand tension adjusting means.

Referring to the drawings in detail, 1 indicates a handle of any desiredpattern and 2, a U-shaped frame or holder to which said handle issecured. The saw blade is desig nated by the reference character 3. Atthe end of the frame, remote from the handle,

is a transverse notch 4 and a slit 5 in which the blade 3 is adapted tofit.

, A swinging link 6, pivoted at 7 to the frame 2, carries at its freeend a transversely extending pin 8 which is adapted to pass through aperfor'ation in the saw blade 3 and lie in the notch 4, as clearly shownin Figs. 2 and 3. To disengage the saw from the pin, it is swung intothe position shown in dotted lines in Fig. 2, as will be obvious. At theopposite end of the frame, adjacent the handle, I provide an improvedlocking and adjusting device for tensioning the saw.

{This device comprises a block 9 having a slit 10 in one end thereof toreceive the saw blade, and also having a transverse notch 11. A pin 12is carried by a swinging link 13, pivot/ed at 14 to the block 9. Thispin is adapted to pass through an opening in the end of the saw bladeand to lie in the notch 11, as clearly shown in Figs. 5 and 6.

In Fig. 4, the parts are shown in full lines as in the position theyoccupy when being assembled. The block 9 carries a pair of spaced lugs15, adapted to embrace the frame 2 and hold the parts in properalinement. Set into the block 9 and extending in line with the saw 3 isan adjustable pin 16, which, in this instance, is shown asscrew-threaded, head 17 and to this head is connected one end of a pairof links 18, as by means of a cross-pin 17. A locking lever 19 ispivoted between the other ends of the links 18, as

indicated at 18, and is provided with a.

rounded extension or toe 20. This toe 20 is adapted to engage a notch 21formed in the outer edge of the frame 2. The end of the lever 19consists of an inclined'portion 22, adapted to fit againstthe wallof'the notch 21, as clearly shown in Fig. 5, and a flat heel portion 23,which, when the lever is in locking position, is adapted to lie againstthe straight outer edge of the frame 2 in such a manner that the leveris maintained substantially at right angles to such edge. The handle 1is preferably so designed that This pin has a flattened its lower edgeextends parallel with the lever when in this position.

It is obvious that by assembling the parts as shown in Fig. 4 and thenplacing the toe 20 of the lever in the notch 21 and swinging such leverto the right, as viewed in Fig. 4, and then upwardly until the partsassume the position shown in Fig. 5, the saw will be placed undertension and the resilience of the frame 2 will maintain the parts insuch locked position. This, of course, is due to the fact that the point18*, to which the strain is applied, is carried from one side of thepivotal point 20, as shown in Fig. 4, to the other side of said pivotalpoint, as shown in Fig. 5, thus passing across the center and holdingthe lever firmly seated against the frame, as shown in Figs. 1 and 5,with the head 17 of the pin 16 in contact with the end of the frame. Inother words, it will be seen from the above that the block is providedwith a pair of extensions 15 adapted to emand lever 19 serve as a crankby means of which the screw-pin 16 may be turned so that no tool orimplement is required to.

make the adjustment. It is believed to. be broadly new with. applicantto. secure the locking lever in this manner to an adjustable pin, and itis thought that the many advantages of this arrangement will be obviouswithoutfurther discussion.

The use of theswinging pins 8 and 12 eliminates the necessity for pinsbeing carried by the blade itself, as in former constructions, andrender the device available for use with any saw blade having an openingthrough each end.

lYhat I claim is l. A saw holder comprising a frame having a notch. inits outer edge, a locking lever having aftoe adapted to engage saidnotch and having a fiatheel portion adapted to lie 7 against theouteredge of the frame when the lever is in locking position, a block havingmeans for holding a saw blade, and a swinging link connection betweensaid block and lever.

. 2 A. saw holder comprising a frame havhaving a fiat end adapted to lieagainst said straight edge so as to maintain said leverprojecting atsubstantial right angles thereto.

whenin locking position, a block adapted to engage and hold a saw blade,and a swinging link'connection between the said block and said leveradjacent its fiat end.

3. A saw holder comprising a frame, a

"locking lever cooperating therewith to, tensionthe saw, a block adaptedto engage and held a, saw blade, a pin screw-threaded into said block,and a pivotal link connection between the end ofsaid pin and said lever,

It is also obvious mg a straight outer edge, a locking lever whereby thetension of the saw may be adjustedby setting said screw-threaded pin.

41 A saw holder comprising a U-shaped frame having at one end means fordetachably connecting a saw blade thereto, and means cooperating withthe other end of said frame for adjustably connecting the saw thereto,said last mentioned means comprising a block adapted to hold the sawblade, a pin screw-threaded into said block and extending in line withthe saw blade, a locking lever adapted to engage the said frame to placethe saw under tension, and a link connection between said lever and saidscrewthreaded pin, the arrangement being such that by screwing up saidpin more or loss the tension of the saw can be varied.

A saw holder comprising a frame and a tensioning and locking devicecooperating therewith, said locking device comprising a leverunconnected with but adapted to engage the frame, a block to which saidlever is pivotally connected, said block having means for holding a sawblade, and a pair of spaced lugs carried by saidblock indcpeni'lent ofsuch pivotal connection and adapted to embrace the said. frame, wherebythe parts are maintained in proper alinement, said lugs forming, betweenthem, an open endedslot.

6. A saw holder comprising a frame, a locking lever having a toe adaptedto engage the outside edge of said frame, a block having means forengaging a saw blade, said block having a pairoflugs or extensionsadapted to embrace the sides of said frame,

and also having a third extension adapted to rest against the end 'ofsaid frame when the parts are in normal position, and a link connectionpivoted at one end to said third extension, and at the other to saidlever eccentrically to the toe thereof, whereby, when said lever isswung about such too as a pivot, the parts are moved into lockedposition.

In testimony whereof I afiiX my signature in presencev of two witnesses.

BENJAMIN E. SMITH. "itnesses V Y H. W. l/VALKiN SHAW, LEWIS C. VVALKmsnw.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, 11.0.

